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2018 BMW 340i xDrive Gran Turismo — 3.0L 6-cyl, S8 automatic, AWD
This 2018 BMW 340i xDrive Gran Turismo (3.0L 6-cyl, S8 automatic, AWD) takes premium gasoline. PREMIUM
23
MPG combined (20 city / 29 hwy)
$3,350
est. fuel cost / year (EPA, 15k mi)
382 g/mi
tailpipe CO₂
The EPA lists this trim as premium because that's the fuel the manufacturer specified for its mileage test. Many such engines will run on regular with slightly lower power and MPG — but check your owner's manual to see whether premium is required or just recommended.
EPA fuel type: Premium · class: Large Cars · retrieved 2026-06-14.